Sounds like you're right on track to me, amigo.
Apologies for not recognizing the bamboo when I see it. I've no excuse, except that I was viewing the synth on an old standard definition CRT TV.
Aside from the background issue, your first set of photos was actually ideal. I could see good definition in the point cloud. Looking at it again, I'd like to see an orbit added in that's using your flash. I think that there's potential for the pine cone, but only if we can blow the shadows off of its surfaces. That said, your current exposure is doing well to pick up the texture on the light stone. Sharp focus + exposure on surfaces is key.
I'd also be interested in seeing you raise the camera up a bit so that it looks down on the scene from more like 45 degrees. You might need one more orbit between the moreorless eye-level shots you've taken and the 45 degree downward orbit to get them to link, but with a subject like this, you can always take more photos if necessary.